On Mon, May 10, 2021 at 04:44:09PM +0100, Matthew Wilcox wrote: > On Tue, May 11, 2021 at 12:02:30AM +0900, Hyeonggon Yoo wrote: > > @@ -382,8 +385,8 @@ static __always_inline unsigned int kmalloc_index(size_t size) > > if (size <= 8 * 1024 * 1024) return 23; > > if (size <= 16 * 1024 * 1024) return 24; > > if (size <= 32 * 1024 * 1024) return 25; > > - if (size <= 64 * 1024 * 1024) return 26; > > - BUG(); > > + > > + BUILD_BUG_ON_MSG(1, "unexpected size in kmalloc_index()"); > > we're being encouraged to use static_assert() these days. > https://en.cppreference.com/w/c/language/_Static_assert > can you tell me difference between static_assert and BUILD_BUG_ON? it seems that mm subsystem does not make use of it now.
